Since you still have all of the original files on the C drive (correct?) I'd delete the partition and recreate it in Disk Management as Prof suggests, then copy the files over again.
You might have damaged some of the files by interrupting the unzipping.
Make sure the Properties box for the new partition has the compress box unticked.
System Volume Information will be recreated along with the new partition. Afterwards, hide your Hidden and Protected System files in Control Panel>Folder Options>View.
I wonder if you might not realize it when you are ticking boxes or choosing risky options. Yesterday when you were trying to Extend a partition in Disk Management, you instead chose to convert it to a Dynamic Disk.
Best to limit your actions to only exactly what you want to do at the moment
, nothing else. If you have any questions, ask here.